ATS Presentation (Rev.0 J0131)
Transcript of ATS Presentation (Rev.0 J0131)
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ATS (Automatic TransformerSwitch)
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Prepared & Presented by
Eng. Mohamad Koubeissi (Head of the Design Department)
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- Type and Operation of ATS
- ATS G/M
- ATS G1/G2
- Break
- ATS G1/G2/M
- Digital ATS
- Problems and possible causes
- Questions
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Type and operation of ATS
There are 3 types of ATS
A- ATS G/M: This type is installed when the Mains electricity is available and the Gen-Set works as standby source.
Operation: ATS monitors the Mains supply. When the Mains fails, the ATS starts, the Gen-Set the load is engaged after warm-up
period. As soon as the Mains supply is available, the power is switched back after a restoration delay and the Generator shuts down
after a certain cooling time without being in load.
B- ATS G1/G2: This type of ATS is installed when the Mains electricity is completely absent and the 2 Gen-Sets work as Main
source.
Operation: G1 is running on load and when the time of the Generator on load comes to the end, the stand-by Generator willautomatically starts and after warm-up period takes the load, then the first Generator stops after a certain cooling time and the cycle
continues according the adjustable cycle time.
In case the requested Generator fails to start or shuts down due to any fault, the stand-by Generator will automatically start and
supply load until fixing the problem of the first one.
C- ATS G1/G2/ M: This type of ATS is installed when the Mains electricity is available but during short time and the 2 Gen-Sets work
as standby source.
Operation: The ATS monitors the Mains supply. When the Mains fails, the ATS starts G1 or G2 depending on the cycle timer. Load is
engaged after warm-up period. As soon as the Mains supply is available, the power is switched back and the Generator shuts downafter a certain cooling time without being in load.
When the time of the Generator on load comes to the end, the stand-by Generator will automatically starts and after warm-up period
takes the load, then the first Generator stop after a certain cooling time and the cycle continues according the adjustable cycle time.
In case the requested Generator fails to start or its contactor fails to engage or shuts down due to any fault, the stand-by Generator
will automatically start and supply load until fixing the problem of the first one.
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ATS G/M
Mains contactor
Gen-Set contactor
OUV relay
Timer 24 hours
Relay 220VAC Timer 220VAC
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ATS G1/G2
G1 contactor
G2 contactor
Timer 24 hours
Relay 12VDC
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ATS G1/G2/MTimer 24 hours
Timer 220VAC
OUV relay
Mains Contactor
Common Contactor
G2 Contactor
G1 Contactor
Relay 12VDC
Relay 220VAC
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ATS G1/G2/M
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ATS G1/G2/M
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ATS G1/G2/M
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Digital ATS G/M, G1/G2, G1/G2/M
Digital Unit
Mains Contactor
Common Contactor
G2 Contactor
G1 Contactor
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Major Problems and possible causes
Mains is available but Gen-Set is running - OUV relay
Mains is absent but the Gen-Set doesnt start - AUTO mode
- Relay RE
Gen-Set is alive but there is no electricity on Load - Mains contactor auxiliary
- Gen-Set solenoid contactor
- Contactor line from Gen-Set Panel
Mains is available but there is no electricity on load - OUV relay
- Gen-Set contactor auxiliary,
- Mains solenoid contactor
ATS G/MProblem cause
Gen-Sets dont alternate - Relays TS, RTS, RT
G1or G2 is alive but there is no electricity on load -Contactor auxiliary and solenoid
- Contactor line from Gen-Set panel
Fault on G1 but G2 doesnt start - Signal coming from relay RA
Miss-connection of electrical inter-lock - Electrical interlock connection
ATS G1/G2Problem cause
ATS G1/G2/M :Same as G/M + G1/G2
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Questions ?